(3*b+160)/7=40 9*(560/t-5)=27
3*b+160=40*7=280 560/t-5=27/9
3в=280-160 560/t-5=3
3в= 120 560/t=3+5=8
в=120/3 t=560/8
в=40 t=70
проверка: проверка:
(3*40+160)/7=40 9*(560/70-5)=27
(120+160)/7=40 9*(8-5)=27
280/7=40 9*3=27
40=40 27=27